Electbic signaling device



R. R. ROOT.

ELECTRIC SlGNALlNG DEVICE.

APPLICATION FILED OCT. 23. 1915.

1 1 93,926. Y Patented Aug. 8, 1916.

- 5/ mwmfon l ff "ED snares PATEW on RALPH 3.3001, OF CLEVELAND, OHIO.

ELECTRIC SIGNALING DEVICE.

Specification of Letters Patent.

Patented Aug. 8, 1916.

Application filed October 23, 1915. I Serial No.'57,388.

. is vibrated by means of an electromagnet.

The object of the invention is to provide certain features of construction which will enable eflicient operation of the horn and further provide a construction which may be readily formedup at a low cost of production.

' Generally speaking, the lnventlon comprises the elements and combinatlons thereof set forth in the accompanylng clalms.

Reference should be had to the accompanying drawings forming a part of this specification, in which Figure l is a sectional elevatlon of the operating mechanism for the horn and the casing which contains it; Fig. 2 is an end elevation of the horn with the casing removed; Fig. 3 is an end elevation with portions in section of the mechanism of the horn with the casing removed; Fig. i is a side elevation of a portion of the horn; and Fig. 5 is an elevation taken in a plane at right angles of the showing in Fig. 4.

The present horn employs a base or supporting member 1 which is provided with a central opening in which opening 1s fastene d the amplifier or horn proper 2. This amphfier may be secured in any desired manner. The base member is saucer-shaped and provided with an annular shoulder 3. Against the shoulder 3there lies the ring of a d1aphragm 4t and upon the diaphragm there lies a portion of a supportmg member 5. The outer or peripheral portion of the base 1 is folded around the edge of the diaphragm 4 and the edge of the support 5, thus holding these members together as a unitarystructure which is water-tight.

The support 5 at the central portion thereof carries a cup;shaped member 6. This cup-shaped member forms the outer portion of the iron core of an electro-magnet. There is an inner portion 7 for the core which comprises a cylindrical member having an opening through the central part thereof. The member 7 has a reduced or neck portion, as indicated at 8, and this neck portion extends through an opening formed in the bottom portion of the cup 6 and through an opening formed in the central part of the support 5. The outer end of the neck portion 8 is swaged so that the parts 6, 7 and 5 are secured to each other. Extending transversely of the support member 5 is a member 8. This member is provided with an opening at substantially the central portion thereof and through this opening the neck 8 also extends so that this member 8 is also held in the manner ust above indicated. The member 8 is provided with arms 9 and 10 which are resilient in character. These members, as will be seen by reference to Fig. 2, are leaf-like members. When lying in normal and unflexed position, the members 9 and 10 tend to extend upwardly and outwardly with respect to the member 8 which joins these arms. These arms 9 and 10 are held in the position in which they are shown in Fig. l by means of a transversely extending member 11. This member 11 isprovided with slots 12 at its ends which are adapted to engage with the end portions of the arms 9 and 10, thus restraining and holding them in the position shown in Fig. l. The transverse member 11 is held to the arms by imparting to the free ends of the arms 9 and 10 a slight bending, as indicated at '12.

The transverse member 11 is resilient and has secured to it the armature 13. This armature is usually circular or in any event is of the same configuration as the configuration of the cup 6 and it will be seen that the armature 13 is in such a position as to be in line with the cup 6 and the inner core member 7. The transverse member 11 supports a transversely extending contact member 14:. This contact member is separated from the transverse member 11 by means of insulat ing material indicated at 15. The contact member 14 is of resilient material and at its opposite ends cooperates with contact members 16 and 17. The contact member 14; is slightly fiexed, as will be .seen in Fig. 1, when the armature is in unattracted position as it is shown in Fig. 1. When the armature tion7 of the electro-magnet; and this pin with an arm 16.

will eventually leave the members 16 and 17 and thus interrupt the circuit flowing through the coils of the electro-magnet.

It will be noted that the construction above defined provides a double contact and break. This feature is of value in that it reduces the spark at the time of break and there is }a further advantage in'that if one contact becomes impaired it will not destroy the operation of'the device as long as the other contact remains in opera le condition.

4 To the diaphragm 4 there is secured a pin P which extends through the central porslots, such as indicatefd'at' 17 and 17,- and each extension is insulated from the arms 9 and 10 by means of insulating material such I as indicatedat 19in" Fig. 1. The extensions.

for the contact members 16 and ,17 are-held upenthe arms 9 and 10 by means of screws extending from holes. in the arms 9 .and10,

which screws thread into plates one of lwhich is shown at 20 in Fig. 1, the screws extending through the slots formed in theextensions 16 and 17 The plates 20 are'insulated from the extensions-16*" and 17? by 'a sheet of insulating material, such as in- 'dicated at 21. The slots formed inthe ex tensions 16 and 17*. are of sufiicient size to provide plenty. of clearance around the screws which hold the parts together, vthis clearance not only permitsadjustability but prevents short-circuiting.

The cup member 6 is provided with. an extending lip 22. This lip supports a block 23 of insulating material. The block carries terminal members 24 and 25. One of the terminal members,/as 24, is secured to one-of the contact members, such -for instance as 16. A convenient wayiof accomplishing this result I find by. Providing the extension 16 cureda conductor 26. To the terminal 25 is secured a conductor 27 which forms one terminal for a coil 28 which is carried'within the cup member 6. The other terminal of the coil which is represented at 29 is fastened to anarm .17 which is formed'u on the extension 17" of the "contact 17. I he terminals leading from a battery or source of electric current will be fastened to the terminals 24 and 25 of the signaling device.

The conductors from the battery 'mayenterthe casing which surrounds the horn by To. this arm there is semeans of an horn.

within a cover 30. This cover is cup-shaped and at the rim of the cup is formed with The mechanism of the horn is opening suitably formed in the an outwardly extending flange which lies against? the siipport 5. The cover is secured by means of a yoke member 31, the legs of whic are secured to the lips 22 and 22 of the cup-shaped member 6 of the electro-magg.

'net. The cover 30 is secured to this yoke by means of a screw32, as indicated in Fig. 1.

Having thus described my invention, what I claim'is: l

In an electric signaling device comprising an electric magnet, a support therefor, 'a pair of oppositel a transverse flexilil disposed. resilient arms, e member engaging and holding the said resilient arms,.an armature carried by the said transverse member; a conducting member extend ng transvegsely of the armature, contact members locate adjacent each end of the conducting members with which the ends of the conducting mem-[ bers may contact, a diaphragm, and means whereby'movement of the armature maybe transmitted to thediaphragm.

2. In an electric signaling device, comprising an electric magnet, a support therefon'a pair of oppositely disposed resilient arms, a

transverse flexiblel member engaging and holding the said rem'lient arms against their outward tension, an armature carriedby said transverse member, a conducting member extending transversely of the armature,

adjustable contact members located adjacent each end of the a conducting member with which the ends In an electric signaling device comiprismg an electric magnet, a support there a pair of oppositely disposed resilient' arms, a transverse flexible member engag ioo p of the conducting member may contact, a" diaphragm, and means whereby movement of thearmature may be trans-;

.mittedto the diaphragm.

ing and holding the said resilient arms, an.

armature carried by'the said transverse member, a conducting member "extending transversely of the armature, contact mem; bers ad ustably carried by the said resilient arms, the said contact members cooperating.

with the ends of the conducting member, a; diaphragm, and means whereby movement of the armature diaphragm.

may-be transmitted-to the 12,0

'4. In an electric device ml prising an electric-magnet, asupporttherefor, a pair of'oppositely .dis'posedjresilient "arms, contact membersfcarriedby the said t arms, said contact members being insulated from the said arms adjiisjtable thereon atransverse flexible member engaging an holding said resilient arms.against;theiroutward tension, an armatnre'c'arried by said transverse memb'enfa conduct-ing member carried by the transverse member, which conducting member is insulated from the transverse member, the conducting member cooperating with the contact members, a diaphragm, and means whereby movement of the armature may be transmitted to the diaphragm.

5. In an electric signaling device comprising an electric magnet, a support therefor, a pair of oppositely disposed resilient arms, a contact member adjustably mounted on each arm, said contact member comprising a head portion and an extension, said extension being provided with slots, means extending through the slots securing the extensions of the contact members upon said arms, said contact members being insulated from the said arms, a transverse flexible member engaging and holding said resilient arms, an armature carried by said transverse member, a resilient conducting member extending transversely of the armature, said conducting member extending beneath the head portions of the contact members, a diaphragm, and means whereby movement of the armature may be transmitted to the diaphragm.

6. In an electric signaling device comprising a diaphragm, an electric magnet having a central opening, an armature cooperating with the electricmagnet, a pin extending through the opening in the electric magnet, said pin cooperating with the armature and diaphragm, a pair of oppositely disposed spring arms, a transverse flexible member engaging and holding the said resilient arms, said transverse member forming a support for the armature, a conducting member extending transversely of the armature, contact mcmbers with which the oppositeends of the conducting member cooperate.

In testimony whereof, I hereunto aflix my signature.

RALPH R. ROOT. 

